Sewing-machine



.0. L, BOSCH AND M. HEMLEB.

SEWING MACHINE. I APPLICATION FILED MAR. 2, 1917- RENEWED NOV. 4, I913-1,304,? 50. Patented May 27, 1919.

3 SHEETSSHEET I.

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O. L, DOSCH AND' M. HEMLEB.

- SEWING MACHINE APPLICATION FILED MAR. 2. I917- RENEWED NOV-4,1918-1,304,750. a Patented May 27, 1919.-

3 SHEETS-SHEEI 2..

VWTNESS ATTORNEY 0. L: DOSCH AND M. HEMLEB. SEWING MACHINE. APPLICATIONmen MAR. 2, 1917. RENEWED NOV. 4. 1918.

1,304,750. Patentgd May 27, 1919.

HEETS-SIL EET 3.

mv TORS Exam. 6 I MWM wmuess BY ATTORNEY To all whom it may concernUNITED sTATEsr ENT OFFICE.

OLIVER L. Boson LAND mnn'rm nnmnnn; on nmznnn'rn, nn'w Jnnsiir,ASSIGNORS TO THE smear. mmnnc'runme COMPANY, A CORPORATION on NEWJnnsnY-..

snw'me-macnmn.

Specification 6t Iletters Patent, Patented May 27, 1919.

Application filed March 2, 1917, Serial No. 151,900. Renewed November 4,1918; Serial 1To.'261,150.

Be it known that we, OLIVER L. Doscn and MARTIN HEMLEB, citizens of the]United States, residing at Elizabeth, in the county of Union and S tateof New Jersey, have in-' vented certain new'and useful Improvements inSewing-'Machines, of which the following is a specification, referencebeing had therein 7 to the accompanyin drawings.

In the usual flat 'd type of sewing ma; chine head the looptaker andfeeding mechanisms are supported by bearing lugs projecting downwardlyfrom the open under. side ofa flatbed-plate, while the resser foot,take-up and needle-actuating mechanisms are sustained by an overhangingbracket-arm carried by a vertical standard whose base-is bolted orscrewed to the u per or cloth-supporting side of the bed-p ate.

Such a sewing machine head is commonly supported by a treadle orpower-stand comprising a flat table-top which is apertured to' receivethe bed-plate and the downwardly projecting and exposed parts carriedthereby; the upper or cloth-supporting surface of the bed-plate beingset flush with the upper surface of the table-top.

Among the disadvantages inherent in the operation of machines of thistype may be mentioned the necessity of disconnecting the driving'belt'and tiltingthe machine headrearwardly to afford access to the mechanismdisposed below the bed-plate for purposes of inspection, cleaning,adjusting and oilingi Being exposed below, any excess oil dripping fromthe lower mechanism becomes a source of annoyance, and, furthermore, theexposed bearing partsreadily collect dust to the impairment of theefficiency of :the machine. Inina'nufacturing theframe of such amachine, the bed-plate and the base of the standard must be carefullyand very accurately machined to insure thejuorrect relative adapted topositioning of the needle, the-needle-hole in the throat-plate, and the.loop-taken beak, when the machined parts and mechanism are assembled. a

v .The present improvement has for an object to provide a sewing machinewhich,

while havin ,a flat rectangular cloth-plate e set flush with thetable-top, will be free from the above and other disadvantages incidentto the practical operation of nabbed machines-such] as heretofore knowma A further object of the invention is to provide a machine inwhich theworking parts below the cloth-plate may at, all times be readilymaintained in a properly lubricated condition, without disturbing thenormal operative position of the machine.

Further objects of the invention will appear from the followingdescription and claims;

To theattainment ofthese ends, the machine frame, in its preferredembodiment, is

formed preferably as a one-piece casting comprising a trough-shapedsupporting bed fromone end of which rises a standard carrylugs disposedabove its bottom and affording supports serving to sustain the bedwithin the usual apertured table-top. A removable cloth-plate isprovided'to close the open up per side of the supporting-bed and isformed with bent over marginal portions which extend beyond and concealthe horizontal out- Wardly projecting supporting lugs above referred to;The cloth-plate is secured in position by suitable means and is cut awayat one end, to fit snugly about the base of the bracketarm standard,while at its opposite end suitable guideways are provided within which acover-plate for the loop -.take-r is slidi'ngly fitted. The cloth-plateis further formed, adjacent said guideways, with an aperture adapted tofit about a rectangular throat-plate which is secured directly toinwardly projecting ledges carried by the side-wall ortions of thesupporting bed.

Prefera ly, a'fiat box-shaped oil-reservoir --is sustained. within thesupporting bed by,

means of downwardly ro ecting deliverytubes which are carried 'y saidoil-reservoir and are removably received within upwardly Openingoil-holes formedin one of the inwardly projecting bearing lugs abovemefitioned. The oil-reservoir carries various other delivery-tubes whichconduct oil to vairious moving parts or bearings requiring lubrication.The oil-receptacle and tubes leading therefrom may be filled withwicking material to suitably control the flow of oil.

In'the accompanying drawings forming a part of this specification,Figure 1 is a per spective view of the machine showing the plan view ofthesup orting bed and the' mechanism contained t erein; the standardbeing shown in section. 5 is a detail of the feed-adjusting screw. Fig.6 is a vertical cross-section on the line 66, Fig. 4. Fig. 7 is atransverse vertical section on an enlarged scale through the supportingbed; the oil receptacle being removed. Fig. 8 is a similar view with theoil-receptacle in position and Fig. 9 is a plan view of the forward endof the supporting bed with the oilreceptacle in position. i r

In the preferred form of the invention, as illustrated, themachine-frame consists of a one-piece casting having a substantiallyhorizontal trough-shaped supporting bed 1 which, at one end, supportsthe vertical standard 2 carrying the tubular bracket-arm 3 terminatin intheusual hollow head 4.

The trough-like bed 1 supports the entire machine-head to be describedand is in turn supported by means of the rearwardly projectinghorizontal bed-supporting lugs 5, 5 and forwardly projecting lugs 6, 6,all of which are disposed above the bottom of the bed 1 and preferablyjust below-the horizontal lane defined by the open upper side of thed 1. The lugs,5, 5 arebored out to receive the usual hinged pins7, 7each of which is pivoted at 8 tea metal block 9 which is set flush withthe table-top tin a manner well-known. The lugs 6, 6 are adapted to restupon the usual ledge 10, Fig. 7, which'is disposed below the uppersurface of the table top t and is common to treadlestands ofthewell-known family-machine type.

J ournaled within the hollow head 4 is the presser-bar 11 andreciprocating needle-bar 12 which is actuated through the usual link. 13by a crank carried at the forward end of the rotary mainshaft 14 towhose op osite pulthe shaft 17, transmits rotary motion to a duplicategear 20 fixed to the lower horizontal shaft 21 which extends within andlengthwise of the supporting bed 1 and is journaled in the inwardlyprojecting bearing lugs 22 and 23 carried by and preferably formed as apart of said bed. To the for- Secured to the main-shaft shaft 26 whichis journaled in the bushing The feeding mechanism is housed within thetrough-shaped bed-1 and comprises the feed-dog 7 carried by the feed-bar30 which at its forward end is formed with a horizontally elongated boss31, Figs. .4 and 9, whose opposite ends are countersunk to receive thepointed ends of the pivot pins 32, 32 carried by the upwardly extendingarms 33, 33 of the feed-rocker 34 which is supported on pointedpivot-pins 35, 35 carried by the frame. The upper side of the elongatedboss 31 is flattened and grooved axially at 36 to receive and conductoil to the pivot-pins 32, 32. The feed-rocker 34 further comprises acrank-arm 37 which is ivotally connected at 38 to one end of a ink 39whose opposite end is connected by a pivot-pin 40 to the lower end of ashort link 41 whose upper end is pivotally connected to the arm 42 ofthe feed-adjusting rocker 43, which is pivotally mounted upon pointedpivot-pins 44, 44, Fig. 4 carried by the frame. One end ofthe pivot-pin40 carries a roller 45, Fig. 9, enterin the curved slot 46 formed in therocker 4 carried by the fulcrum-shaft48 which is journaledin the bearinglug 22. The rocker 47 is provided with a yoke 49 which embraces the,feed-advancing eccentricor cam 50 fixed to lower end of the crank-arm 54whose uppersplit-socketed end is clamped about one end of a shorthorizontal fulcrum-shaft 55 which is journaled in the inwardly extendingbearing boss 56 carried by the supporting bed 1. Fixed to the other endof the shaft 55 is 'a feed-lifting arm 57 whose free end carries a,roller 58 adapted to sustain the rearwardly extending free end of thefeed-bar 30. A

spring 59, attached at its upperend to the feed-bar and at its lower endtoan extension 60 of the arm 57, serves to maintain the feed-bar incontact with theroller 58.

The feed-adjusting rocker 43' serves to shift the working position ofthe pin 40 rela-' tively to the fulcrum 48 ofthe rocker 47 and isactuated to shift the pin 40 by means of the feed-adjusting screw 61,Figs. 4 and 5, sustained within the bed 1v and formed with asquarethread 62 which acts, when the. screw is turned, to raise or lower thepin 63 carried at the free end of the arm 64 of the feed-adjustingrocker 43. The side-wall gang-7m person of the bed 1 adjacent these'i'ewer is apertured to receive a spring-pressed detaming pin 65 which isadapted to snap into not described it is rendered. dustroof and a theheretofore exposed lower mec anism is any one of the of ripher'alnotches I5 '66 formed at the lower eggmportion of the head '67 of thescrew '61. The

ried b the head 67 serves to preventthe screw ing turned more than onecomplete revolution.

A detachable cloth-plate 70 is provided to tightl close the open upperside of the pin- 68 car:

trou'g -like supportm-g bed 1 and afford a suitable supporting surfacefor the work being stitched. This late is rectangular in form and ispreferably punched out of sheet metal .the peripheral portion being bentover as shown at 71' to stiffen the plate and giize it athickenedappearance As will be clear from Figs. 1 and 2, one end f theplate C7 3 to fit over the head 67 of the feed-adjustmg screw 61. Thefront end of the plate 70 is provided with parallel guideways. 74, '14

within which the usual cover-plate 7 5 for the loop-taker is s'lidinglyfitted=- A spring 75 secured to the 'coverlate7 5 acts to hold thelatter in contact wit the guidcways 74, 74. The plate 70 is furtherapertured at 76 to fit about the rectangular throat-plate 77 which isscrewed to the top surface of the inwardly extendin ledges 78-, 78formed on the bed 1. Suitably disposed screws 7 9 serve to secure thecloth-plate 70 to thebed 1. .It will be noted that the cloth-plate iswide enough to entirely cover and practically conceal the bed-supportinglugs, thus giving the machine a neat and finished appearance.

means of oil which is distributed to the various bearing parts from aflat, box-shaped, oil-reservoir 80, which is supported within the bed 1by means of a pair of spaced vere tically disposed delivery-tubes 81,82, fixed to and extending downwardly from the reservoir 80. The tubes81, 82 fit into corresponding oil-holes 83, 84 drilled into the bearingboss 22 and leading to the shafts 21 and 48, respectively. Various otherdelivcry-tubes 85, carried by and radiating in difi'erent directionsfrom the reservoir 80, conduct oil to the several other bearingsrequiring lubrication. The reservoir 80 and delivery-tubes 81, 82 and 85are filled with suitable wicking material 86' which acts to control theflow of oil through the deliverytubes. The wicking material projectsfrom the free ends of the delivery-tubes and said projecting portionsare adapted to wi e over.

..the various oil holes to which the l ricant is to be conducted, thusacting to slowly. supvided with an oil-receiving aperture 87 .70 is cutaway at 72 to snugly embrace the base of the standard 2 and is aperturedat.

The lower mechanism is lubr' icatedby which registe'rs'witha supplyaperture 88 in the cloth-plate 70, Fig. 8.

By constructing the machine in the mani it tightly incased. I Moreover,any excess oil dripping from the working parts will be caught bythe-supporti bed from which it cannot escape;- It'is deslrable, althoughnot essential, that the casting for the framev be formed in one piecefor the reason that, when so formed, all the bearing apertures may bedrilled in one operation by a suitable When the workin parts areassembled in the frame, the nee 1e will accurately regis- "automaticdrilling and reaming .machine."

ter with the needle-hole in the throat-plate" I and will be properlyspaced from the point of the loop-taker beak. The heretofore time- Iconsuming operation of aecuratel fitting the bracket-arm to thesupportingdie this obviated and precision in the positioning of thecooperating stitch-forming elements is assured.

Should the cloth-plate of the presentp'machine become marred orotherwise damaged, it may be readily removed for repair or replacementby a new one.

In the presentrii hine the problem of oiling the lower mechanism isgreatly simplified as itis unnecess'a chine, remove the belt an tilt themachinehead rearwardly to expose the lower bearing parts forlubrication. With the presept con-' struction it is merely necessary tosupply a small quantity 3f oil to the IIQSGIVOII 80 through the oil-holein the cloth-plate. This "may obviously be done-without disturbing theposition of the machine-head. 7

. While the preferred form of the invention'has been shown anddescribed, it is to be understood that its essential elements of construction are susceptible of material modifistandard and overhangingsaid supporting- .bed.

3. A sewing machine frame comprising a trough-shaped supporting bed having bedsupporting means disposed above the bottom of and bed, astandard fixed directlv to and carried by one end-portion of said bed.

.95 to stop the ma-;

and a bracket-arm carried by said standard and overhanging sald bed,

4. A sewing machine frame comprising a trough-shaped supporting bed, astandard fixed directly to and carried by one endportion of saidsupporting bed,a bracketarm carried by said standard and overhangingsaid supporting bed, and adetachable bed-supporting means, a standardcarried by and rising from one end of said supporting bed, a bracket-armcarried by said standard and overhanging said supporting bed, and

a detachable cloth-plate of larger size than the open top of saidtrough-shaped supporting bed and adapted to close the upperside of saidbed and conceal said bed-supporting means.

7. A sewing machine frame comprising an open-topped trough-shapedsupporting bed, standard and bracket-arm, all cast in one piece, and acover-plate'wider than said bed and serving to close the open upper sideof the latter.

8. A sewing machine comprising, a frame formed with a trough-shapedsupporting bed, a standard rising from one end of said bed, 'abracket-arm carried by said standard, stitch-forming and work-feedingmech ani'smsincorporated in said frame and including moving elementssupported directly by and within said trough-shaped 9. A sewing machinecomprising, a frame formed with a trough-shaped supporting bed, astandard carried by and rising from Y one end of said beyl a bracket-armcarried.

by said standard,-a cloth-plate wider than said bed and closingsubstantially the entire open upper side of the latter, stitch-formi ingand work-feeding mechanisms incorporated in said frame andincludingmoving elements supported" directly by said bed in dependentlyof said cloth-plate. 7

10L A sewing machine comprising a frame I formed with an open-toppedtrough-shaped supporting bed having inwardly. projecting bearing lugs, astandard supportedby and rising from one end of said bed and abracket-arm carried by said standard, stitchforming and work-feedingmechanisms incorporated in 1 said frame and including moving partsjournaled in said bearing lugs, I

and a cover-plate serving to close the upper side of said supportingbed. I

11. A sewing machine comprising a frame having a trough-likesupporting-bed, a stand- 12. A sewing machine comprising a trough-'shaped supporting bed, bearing lugs fixed directly to and disposedwithin the hollow of said'bed, a standard supported by and rising fromone end of said bed, a bracket-arm carried by said standard,stitch-fonning mechanism including a loop-taker actuating shaftjournaled in certain of said lugs within said bed, feeding mechanismsupported within. said bed by others of said lugs and actuated by saidshaft, and a detachable cloth-plate serving as an upper closure for saidbed. 7

13. A sewing machine comprising a frame formed with a trough-shapedsupporting bed, stitch-forming andwork-feeding mechanism incorporated insaid frame and in- -cluding moving parts housed within said bed, adetachable cloth-plate serving as an upper closure for said bed, anoil-reservoir disposed within said bed and having an oilreceiv-ingopening in its upper side, and delivery-tubes leading from saidreservoir to said moving parts," said' cloth-plate being formed with anoil-supply opening which said receptacle.

14,-, A sewing machme comprislng a frame registers with theoil-receiving opening in formed with a trough-shaped supportingbed,stitch-fonning and work-feeding mech anisms incorporated in said frameand ineluding moving parts housed within said bed, and a removableoiling device support ed within said bed, said' oiling deviceincludingan oil-reservoir and delivery-tubes carried thereby, saiddelivery-tubes being adapted to conduct oil to various of the movipgparts requiring lubrication.

In testimony whereof, we have signed'our names to this specification.

oL'IvE-R L. DO SGH. MARTIN HEMLEB.

